this red longan is a hit in indonesia.most of plants there are grafted and air layered.will it come true like the parent plants if planted from seed?

I read it won´t come true from seed, and a member here (Klompen Capir) told me it is a fact.Would be good to find a red longan that come true from seed...About the seeds in the photo, I think at least those 3 smallest, near the one with "Xun" signature, aren´t viable.